The structures 尽管…但是/可是…
"Although..., but..."
The structures 尽管…但是… 
and 尽管…可是… are used in the same way. They mean “although..., but...” or “even though...”.
In a sentence, the first clause beginning with 尽管 expresses background information, while the second clause beginning with 可是 or 但是 expresses the fact or conclusion you assert.
and 尽管…可是… are used in the same way. They mean “although..., but...” or “even though...”.
In a sentence, the first clause beginning with 尽管 expresses background information, while the second clause beginning with 可是 or 但是 expresses the fact or conclusion you assert.Examples
尽管这次考试很难，但是很多人都通过了
Despite the difficulty of this exam, many people passed
jǐnguǎn zhè cì kǎoshì hěn nán, dànshì hěnduō rén dōu tōngguò le
If a sentence has two subjects, the first subject is placed after 尽管 and the second subject is placed after 可是 or 但是.
Scheme
尽管
subject 1
predicate 1
可是/但是
subject 2
predicate 2
Pay attention
可是 can be shortened to 可.
但是 can be shortened to 但.
Examples
尽管我很想参加聚会，可是今晚我得加班
Even though I would really like to go to the party, I have to work extra hours tonight
jǐnguǎn wǒ hěn xiǎng cānjiā jùhuì, kěshì jīnwǎn wǒ děi jiābān
尽管他赚了很多钱，但他不快乐
Even though he earned a lot of money, he is still unhappy
jǐnguǎn tā zhuàn le hěn duō qián, dàn tā bú kuàilè
Pay attention
可是 is usually associated with negative sentiments. For example: disappointment, frustration, regret, pity, etc.
If both clauses share the same subject, you should state the subject in the first clause, without repeating it in the second clause.
Scheme
subject
尽管
predicate 1
可是/但是
predicate 2
Examples
我尽管知道，但是什么都没说
Even though I knew, I didn't say anything
wǒ jǐnguǎn zhīdao, dànshì shénme dōu méi shuō
他尽管经验最少，但是教得最好
Even though he has the least experience, he teaches best
tā jǐnguǎn jīngyàn zuì shǎo, dànshì jiāo de zuì hǎo